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Thank you, everyone! Welcome to this talk on Continuous Integration and Continuous Delivery (CI/CD) and DevOps with Ruby and Rails.
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In this session, we'll discuss how to implement CI/CD practices in your daily job, focusing on making life a little easier. Let's start with a clear definition.
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CI/CD first emerged in the context of web development around 2008 in the USA during an agile conference. It was introduced by one of the inventors of the Agile methodology. Essentially, CI/CD is a practice aimed at reducing the time between committing a change to the system and deploying it to production.
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In software development, we often encounter a situation where the market cannot match the velocity of our development process. Typically, when we receive a new requirement from a customer, the usual timeline includes development, testing, and finally, releasing the software. Traditionally, this can take six months for major developments or even two weeks for smaller releases, exposing us to numerous problems.
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The main complications arise due to declining quality, as it's nearly impossible to conduct thorough testing in such a short timeframe. Moreover, larger organizations struggle with managing releases effectively, leading to significant issues if things go wrong during deployment. CI/CD processes help to reduce this time while ensuring the quality of the software.
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I've encountered many who question the need for continuous integration and development, particularly in financial sectors. For instance, the case of Knight Capital, a financial firm, illustrates how the absence of CI/CD can lead to disastrous results, costing them over 440 million dollars due to faulty releases.
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In another example, a software release from Goldman Sachs led to outages that cost them millions in damages as a result of faulty deployments. Continuous integration and effective release management allows for a smoother development cycle, minimizing risks associated with major updates.
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One fundamental aspect of CI/CD is that it changes how organizations think about software development and operations. It's essential to involve operational staff when designing applications. This collaboration ensures that software systems are maintainable and that potential issues are identified early.
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For example, if developers release software without considering operational support, they may overlook critical logging or monitoring features that could be vital for diagnosing issues during deployment.
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It's crucial to define requirements clearly and integrate operational feedback to prevent miscommunication. The dev team should be accountable for the software they release, ensuring they are involved in fixing any issues that arise post-deployment.
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This responsibility encourages developers to not only focus on feature development but also on the operational aspects of their software. By working closely with operational staff, they can foresee potential issues and take proactive measures.
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It's essential to ensure that all members understand the current state of the infrastructure and any limitations. Developers can help identify compatibility issues with libraries or tools the organization is currently using.
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A standard practice in agile environments is to maintain open lines of communication. This means developers should be able to discuss and address issues with operations staff seamlessly, ensuring faster resolution.
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As we proceed, I'll be sharing key methodologies surrounding CI/CD and DevOps principles, starting with unit testing as it serves as the foundation for continuous integration. Automated testing and configuration management tools complement this approach.
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Continuous Integration (CI) is essential for merging code changes frequently, resulting in early detection of defects. Tools like Jenkins can automate the process by running tests every time code is pushed, ensuring stability and readiness for deployment.
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Automated tests not only verify functionality but also prevent regressions. When developers know their code will be tested continuously, this fosters a culture of quality and speed.
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Moreover, it allows teams to release smaller increments of features more often, leading to better customer satisfaction. The objective here is to minimize the risk associated with larger updates by releasing many smaller, well-tested changes.
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Let's consider the differences between traditional deployment cycles and a CI/CD approach. In a traditional model, teams might spend weeks or months developing features before deploying, which can lead to major issues if a last-minute problem arises.
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In contrast, CI/CD encourages a more iterative process where smaller portions of code are continuously integrated and tested, ensuring faster feedback and fewer integration issues.
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Introducing infrastructure as code (IaC) is another crucial element within this context. With tools like Chef or Puppet, developers can automate the deployment and configuration of their infrastructure, ensuring consistency and quality across environments.
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IAc allows teams to define the underlying infrastructure needed for their applications in a way that can be version-controlled just like code, significantly improving collaboration between developers and operations.
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This leads us to consider the lifecycle of DevOps. We need to adopt a mindset that emphasizes collaboration, communication, and shared responsibility for both development and operational concerns.
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Remember the agile approach? It allows for small teams to work efficiently and with shared responsibility. When a small team of developers can collaborate on an issue, they can quickly diagnose and implement a solution.
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Each member must take accountability, recognizing their role in the success of each project. DevOps encourages this through continuous dialogue and collaboration, ensuring that everyone remains aligned with project goals.
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Transitioning to CI/CD involves adopting unit testing as the foundation for continuous integration. The basics of continuous integration focus on running your tests and maintaining the health of the software through regular automated processes.
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Leveraging automation helps to eliminate human error, ultimately leading to more reliable deployments. However, continuous integration is not merely about running tests; it's about nurturing a culture where everyone is invested in the quality of the software.
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On platforms like Jenkins, we can set up automated builds that take place every time code is developed. The benefit here is that testing becomes an inherent part of the development process, enhancing communication between development and operations.
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In traditional systems, deploying meant a complex series of manual steps, whereas with CI/CD, the deployment process is largely automated. This reduction in manual steps inherently minimizes risk.
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Additionally, continuous monitoring goes hand-in-hand with CI/CD strategies. Monitoring tools, like New Relic, allow teams to spot issues early on in the production environment.
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Recognizing performance issues quickly can save organizations significant resources and prevent user dissatisfaction. This proactive approach to monitoring ties back to the collaborative ethos of DevOps.
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Through constant communication and operational visibility, development teams can address user feedback swiftly, iterating on their products in a way that enhances user experience.
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In conclusion, the adoption of CI/CD and DevOps principles facilitates faster and more efficient software delivery cycles. By fostering teamwork between developers and operations, we can create a culture that values quality and speed.
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Implementing these strategies doesn't happen overnight; it requires commitment from everyone in the company. However, the results of streamlining processes and improving communication can lead to substantial long-term benefits.
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These practices will not only improve the technical aspects of software delivery but also enhance customer satisfaction as features are released more frequently and with fewer issues.
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As we continue our work within the realm of software development, I encourage each of you to reflect on the practices you've learned today and consider how they can be integrated into your workflows. Thank you for your attention!